Garden implement

ABSTRACT

Aspects of the disclosure relate to a garden implement that includes a handle, at least one tool member having a pair of flanges extending therefrom, each flange includes a flange bore and a pinion segment that share a common center, the pair of flanges have opposing parallel surfaces that each include the pinion segment, the opposing parallel flange surfaces are spaced apart by a first distance. Also included is at least a first fixing member coupled between the pair of flanges and the handle. The first fixing member includes a boss projecting along a longitudinal axis, the boss has parallel surfaces spaced apart by the first distance, a boss bore, and a curved rack segment projecting from the boss and configured to mesh with at least a portion of the pinion segment. Also included is a fixing shaft insertably received in at least one flange bore and the boss bore.

CROSS REFERENCE TO RELATED APPLICATIONS

This application for patent is a continuation of U.S. patent applicationSer. No. 17/033,548 (now U.S. Pat. No. 11,700,780) entitled “GardenImplement” filed in the United States Patent and Trademark Office onSep. 25, 2020, the entire content of which is incorporated herein byreference as if fully set forth below in its entirety and for allapplicable purposes.

BACKGROUND Field

The present disclosure relates to the field of gardening. Morespecifically, the present disclosure relates to gardening implementsthat work soil.

Background

Plants, trees, and all non-animal life forms (individually orcollectively referred to herein as vegetation) surround us. Somevegetation grows in the wild and other vegetation is cultivated, by wayof example, for ornamental purposes, for boundary marking purposes, forfood consumption purposes, or any combination thereof. Persons thatcultivate vegetation for personal use and enjoyment are often calledgardeners. Gardeners may plant, grow, and tend to vegetation such astrees, flowers, shrubs, vegetables, fruits, and herbs in plots of landadjacent to or near their homes, in communal settings, and/or in indoorsettings such as green houses and/or in closed-in settings whereartificial light is used. These plots of land may be small in size, forexample when the plot consists of a border with decorative bushes and/orflowering plants surrounding a home or apartment building. These plotsof land may be medium in size, for example when a plot includes a yardof a home and consists of one or more areas of ground within whichtrees, vegetables, and/or ornamental plants are grown. These plots ofland may be large in size, for example when a plot is used to growvegetables to feed one or a number of households. In general, theseplots of land are referred to as gardens. In contrast, other plots ofland may be called farms and the people that tend to them may bereferred to as farmers. Gardeners and farmers have many of the sameduties but perform those duties on different scales.

Additionally, other persons that do not necessarily refer to themselvesas gardeners or farmers may also be responsible for planting and tendingto vegetation. For example, trees, shrubbery, and plants may be used todemarcate borders of a property and/or add ornamentation to the groundssurrounding a home or business. Trees, shrubbery, and plants may also befound in and around open spaces where persons congregate to enjoy theoutdoors. These non-garden-specific, non-farm-specific plots of land maybe tended to by property owners that do not necessarily considerthemselves to be gardeners or farmers or may be tended to by commercialentities hired to plant and/or maintain the vegetation in these sorts ofplots of land. These types of people may be referred to by variousnames, such as groundskeeper.

Despite the different nature and sizes of the plots of land thatgardeners, farmers, and groundskeepers tend to, they all make use ofmany of the same or similar tools to tend to their vegetation. Thesetools include, for example, a spade, a trowel, and a hoe. These and manyother tools are referred to herein as garden tools.

Generally, garden tools are unitary in nature; that is, each garden toolis separate from another. A first garden tool (e.g., a spade with afixed short handle) is distinct from a second garden tool (e.g., a hoewith a fixed long handle). Due in part to mass production, theorientation between a given working part of a garden tool and the handleof that garden tool is well established. However, consumers may findvalue in garden tools that are able to be customized to fit eachrespective consumer's own style of gardening.

SUMMARY

The following presents a summary of one or more aspects of the presentdisclosure, in order to provide a basic understanding of such aspects.This summary is not an extensive overview of all contemplated featuresof the disclosure and is intended neither to identify key or criticalelements of all aspects of the disclosure nor to delineate the scope ofany or all aspects of the disclosure. Its sole purpose is to presentsome concepts of one or more aspects of the disclosure in a form as aprelude to the more detailed description that is presented later.

A garden implement is disclosed. The garden implement includes a handlehaving spaced apart handle ends, at least one tool member having a pairof flanges extending therefrom, each flange including a flange boredefined by a flange internal sidewall and a pinion segment having acommon first center with the flange bore, the pair of flanges havingopposing parallel flange surfaces each including the pinion segment andhaving a pinion center axis intersecting the common first center andperpendicular to the opposing parallel flange surfaces, the opposingparallel flange surfaces spaced apart by a predetermined first distance,at least a first fixing member coupled between the pair of flanges and arespective handle end. In the garden implement, the first fixing memberincludes a first boss projecting along a longitudinal axis relative tothe first fixing member, the first boss having parallel first bosssurfaces spaced apart by the predetermined first distance, a first bossbore defined by a first boss internal sidewall, and a first boss borecenter axis intersecting a first boss bore center and perpendicular tothe parallel first boss surfaces, each respective first boss surfacehaving a curved rack segment projecting perpendicularly therefrom andconfigured to mesh with at least a portion of the pinion segment. Thegarden implement also includes a fixing shaft insertably received in atleast one flange bore and the first boss bore following coaxialalignment of the pinion center axis and the first boss bore center axis.

An interchangeable toolhead is disclosed. The interchangeable toolheadincludes a tool member and a pair of flanges coupled to and extendingfrom the tool member. Each flange includes a flange bore defined by aflange internal sidewall and a pinion segment having a common firstcenter with the flange bore, the pair of flanges having opposingparallel flange surfaces including at least the respective pinionsegment and a having a pinion axis intersecting the common first centersand perpendicular to the opposing parallel flange surfaces, the opposingparallel flange surfaces spaced apart by a predetermined first distance.

A plurality of articles of manufacture packaged as a garden implementset is disclosed. The garden implement set includes a handle havingspaced apart handle ends, at least two toolheads each having a pair offlanges extending therefrom and including opposing parallel flangesurfaces spaced apart by a predetermined first distance, at least twofixing members each fixed to respective handle ends and configured tocouple the handle to a respective one of the at least toolheads, and atleast two fixing shafts, each configured to be insertably received in afirst fixing shaft receiver of a respective toolhead and a second fixingshaft receiver of a respective fixing member when the fixing shaft,first fixing shaft receiver, and second fixing shaft receiver arecoaxially aligned.

These and other aspects of the disclosure will become more fullyunderstood upon a review of the detailed description, which follows.Other aspects, features, and embodiments of the present disclosure willbecome apparent to those of ordinary skill in the art, upon reviewingthe following description of specific, example embodiments of thepresent disclosure in conjunction with the accompanying drawings. Whilefeatures of the present disclosure may be discussed relative to certainembodiments and figures below, all embodiments of the present disclosurecan include one or more of the advantageous features discussed herein.In other words, while one or more embodiments may be discussed as havingcertain advantageous features, one or more of such features may also beused in accordance with the various embodiments of the disclosurediscussed herein.

BRIEF DESCRIPTION OF THE DRAWINGS

Reference is made to the accompanying drawings in which are shownillustrative embodiments of a garden implement in accordance with someaspects of the disclosure. In the accompanying drawings, correspondingreference characters indicate corresponding parts.

FIG. 1A is a top plan view of an ergo-dynamic dual-headed gardenimplement including two interchangeable tools heads that may be selectedfrom a plurality of interchangeable toolheads according to some aspectsof the disclosure.

FIG. 1B is the top plan view of the garden implement of FIG. 1A with afirst fixing shaft cover and a second fixing shaft cover removed.

FIG. 2 is a top plan view of another ergo-dynamic dual-headed gardenimplement including two interchangeable toolheads that may be selectedfrom a plurality of interchangeable toolheads according to some aspectsof the disclosure.

FIG. 3 is a perspective view of the garden implement of FIGS. 1A and 1B.

FIG. 4 is a cross-section along the lines 4-4 of FIG. 3 , of the gardenimplement of FIGS. 1A and 1B according to some aspects of thedisclosure.

FIG. 5 is an exploded perspective view of a portion of the gardenimplement as depicted in FIG. 3 according to some aspects of thedisclosure.

FIG. 6A is a left side elevation view of a fixing member and aninterchangeable toolhead of a garden implement in a spaced apartorientation according to some aspects of the disclosure.

FIG. 6B is a top plan view of the fixing member and the interchangeabletoolhead of FIG. 6A.

FIG. 6C is a top plan view of the fixing member and the interchangeabletoolhead of FIG. 6A and FIG. 6B according to some aspects of thedisclosure.

FIG. 7A is a top plan view of a fixing member, a toolhead, and a portiona handle of a garden implement according to some aspects of thedisclosure.

FIG. 7B is a top plan view of the fixing member and the toolhead of FIG.7A, where the toolhead is in a “nominal” orientation.

FIG. 7C is a top plan view of the fixing member and the toolhead of FIG.7B where the toolhead is rotated from the nominal orientation of FIG. 7Bto a maximum angular displacement counterclockwise.

FIG. 7D is a top plan view of the fixing member and the toolhead of FIG.7C, where the toolhead was removed from the fixing member, rotated aboutthe longitudinal axis, and reinstalled to the fixing member according tosome aspects of the disclosure.

FIG. 8A is a garden implement with a first fixed orientation of atoolhead relative to the handle of the garden implement according tosome aspects of the disclosure.

FIG. 8B is the garden implement of FIG. 8A where the handle was rotated(e.g., inverted) from the orientation shown in FIG. 8A.

FIG. 9A is a first garden implement having a first handle with a firstcenter segment having a first center length according to some aspects ofthe disclosure.

FIG. 9B is a second garden implement having a second handle with asecond center segment having a second center length according to someaspects of the disclosure.

FIG. 9C is a third garden implement having a third handle with a thirdcenter segment having a third center length according to some aspects ofthe disclosure.

FIG. 9D is a fourth garden implement having a fourth handle with afourth center segment having a fourth length according to some aspectsof the disclosure.

FIG. 10A is an illustrative example of a first interchangeable toolheadaccording to some aspects of the disclosure.

FIG. 10B is an illustrative example of a second interchangeable toolheadaccording to some aspects of the disclosure.

FIG. 10C is an illustrative example of a third interchangeable toolheadaccording to some aspects of the disclosure.

FIG. 11 is a graphical representation of plurality of articles ofmanufacture packaged as a garden implement set according to some aspectsof the disclosure.

DETAILED DESCRIPTION

In the following description, specific details are given to provide athorough understanding of the described implementations. However, itwill be understood by one of ordinary skill in the art that theimplementations may be practiced without these specific details. Forexample, in some instances, details of well-known structures andcomponents may be shown in simplified form in order to avoid obscuringsuch structures and components. In other instances, well-knownstructures and components may be shown in detail in order not to obscurethe implementations.

A garden implement having an ergonomically shaped handle is disclosed.As used herein the word “implement” may mean an object or a piece ofequipment that may be used for a particular purpose. Fixing members maybe coupled to either or both ends of the handle. In one non-limitingexample, the gardening implement includes a handle having first andsecond ends. The handle may be divided into two or more segments. Forexample, the handle may be divided into three segments including a firstsegment, a center segment, and a second segment distal from the firstsegment and the center segment. The segments may be the same ordifferent lengths. Angles of one segment relative to an adjacent segmentmay be the same or different. In one example, the handle including thefirst, center, and second segments, are continuously formed. In someexamples, segments may be coupled to one another using an inter-segmentangle fixing structure (e.g., a joint) that allows a user to changeablyfix the angle between adjacent segments.

A fixing member may include a boss extending from the fixing member in alongitudinal direction relative to the fixing member. In some aspects,the fixing member is fixedly coupled to the handle, accordingly, thelongitudinal direction may also be relative to the handle. The boss maybe configured to couple to one of a plurality of interchangeabletoolheads. In some examples, an interchangeable toolhead may include atool member coupled to a pair of flanges. Tools may include, forexample, a spade, a hoe, and a trowel. The preceding list isnon-limiting: other tools are within the scope of the disclosure. Insome examples, the tool member may be coupled one flange. According tosome aspects, the symmetry of the fixing member relative to the handle,the boss relative to the handle, or both the fixing member and the bossrelative to the handle may have at least one of right-left symmetry,top-bottom symmetry, or axial symmetry; however, symmetry is notlimitation of the disclosure.

In examples in which the interchangeable toolhead may include a toolmember coupled to a spaced apart pair of flanges, a width of the bossprojecting from the fixing member may be substantially equal to aspacing between spaced apart parallel surface of flanges. In oneexample, the Toolhead includes the tool member and the pair of flanges.In another example, the tool head may include the pair of flangesconfigured as one object. Openings, apertures, or boreholes (referred toherein as “bores”) may be provided through the flanges and the boss.Flange bores may be defined by internal sidewalls of the flange, while aboss bore may be defined by internal sidewalls of the boss. The bores inthe flanges and boss may be configured to have coaxial alignment withone another when a fixing shaft fixes an interchangeable toolhead to afixing member. The fixing shaft may restrict movement of theinterchangeable toolhead by being received in at least one of the boresin the flanges and the bore in the boss. Angle fixing structures (e.g.,an internal gear segment (e.g., a portion of an internal gear)configured to mesh with at least a portion of a pinion segment may beintegrally formed with or in the boss and the flanges to lock theinterchangeable toolhead at a predetermined angle relative to the fixingmember (and therefore relative to the handle).

The boss may be configured to slide, in the direction of thelongitudinal axis, between opposing surfaces of the parallel flangesuntil at least some of a plurality of first teeth on the flanges aremeshed with at least some of a plurality of second teeth that may beformed in the boss. An angle of the interchangeable toolhead relative tothe fixing member (and therefore relative to the handle) is selectablebased on which of the plurality of first teeth of the flanges are meshedwith the plurality of second teeth of the boss. The fixing shaft, whenreceived in the bore of the boss and at least one of the bores of theflanges may fix the angle of the interchangeable toolhead relative tothe fixing member (e.g., relative to the longitudinal axis). Changingthe angle involves complete removal of the fixing shaft from the bore ofthe boss of from the bore of the boss and the bores of the flanges anddisengagement of the plurality of first teeth of the flanges from theplurality of second teeth of the boss.

In general, the garden implement described herein may be a dual headedimplement having different toolheads at distal ends of the gardenimplement. The toolheads may be adjustable to various angles using adurable sprocket-like coupling structure. The toolheads may beinterchangeable and may be selected from a plurality of toolheads eachimplementing a different tool member (e.g., a different working part ofa garden tool). The handle may be divided into segments having specificangles between adjacent segments. The angles may be the same ordifferent. The angles enhance the usability of the garden implement. Forexample, the angles may provide a user with a greater mechanicaladvantage in comparison to a straight handle. Additionally, due theangles, the garden implement may be flipped over (e.g., rotated about acentral axis of the handle of the garden implement) to provide a secondfunctionality to the same toolhead previously utilized for a firstfunctionality (e.g., a soil scraper first functionality and a shovelsecond functionality). Furthermore, the angles of the toolheads relativeto the handle are changeable by a user. The plurality of availableangles between a toolhead and the handle provide a plurality of ways thetool member of a toolhead may be used by a user of the garden implement.

FIG. 1A is a top plan view of an ergo-dynamic dual-headed gardenimplement 100 including two interchangeable toolheads (i.e., a firsttoolhead 102 and a second toolhead 104) that may be selected from aplurality of interchangeable toolheads according to some aspects of thedisclosure. FIG. 1B is the top plan view of the garden implement 100 ofFIG. 1A with a first fixing shaft cover 106 and a second fixing shaftcover 109 removed. The first fixing shaft cover 106 and second fixingshaft cover 109 may be integrally formed with a portion of an overallstructure referred to herein as a fixing shaft; however, covers for thefixing shafts are optional. Additionally, the covers may be substitutedfor grasping structures having shapes adapted for grasping and rotating.These structures/shapes may include a tab and a wing-nut structure/shapethat may be formed integrally with the fixing shaft or may be acomponent part of an assembly configured to perform the function of thefixing shaft. FIG. 1A and FIG. 1B may be collectively referred to asFIG. 1 herein.

In the example of FIG. 1 , the first toolhead 102 is depicted as a hoeor a hoe-like tool member and the second toolhead 104 is depicted as aforked weeder or forked cultivator. The toolheads represented in FIG. 1are interchangeable toolheads and are provided as non-limiting examples.

A first angle 110 (denoted as A1) of the first toolhead 102 relative toa handle 112 (or, as-illustrated in the exemplary figure, relative to afirst segment 126 of the handle 112) may be selected by a user. In theexample of FIG. 1 , a first tool member 103 of the first toolhead 102 isperpendicular to the longitudinal axis 108 projecting from a firstfixing member 114. This orientation may be referred to as a nominalorientation. The first toolhead 102 may be reoriented clockwise orcounterclockwise relative to the nominal orientation. Reorientationrequires removal of a fixing shaft 131 from at least one flange and froman opening in the first fixing member 114. The openings are referred toas “bores” (e.g., bore holes) herein. The openings in the flanges arereferred to as “flange bores” and the opening in the fixing member 114is referred to as a “boss bore” because the opening in located through aportion of the fixing member 114 which is referred to as a “boss”herein. Reorientation requires removal of the fixing shaft 131 from theboss bore and at least one flange bore. Reorientation also requires thedisengagement of a first locking feature (also referred to as a segmentof a pinion gear or a pinion segment 116 a herein) from the secondlocking feature (also referred to as a segment of an internal gear, aninternal gear segment, a ring gear, ring gear segment, or a curved racksegment 118 a herein). Additional details about the flange bores, bossbore, first locking feature and second locking feature are providedthroughout the disclosure.

Reorientation established the first angle 110 depicted in FIG. 1 . Thefirst angle 110 may be fixed by insertion (e.g., engagement) of thefixing shaft 131 into at least one flange bore and into the boss bore.To change the first angle 110 of the first toolhead 102, for example,the user may proceed through several steps. In the example of FIG. 1 ,the user may remove a first fixing shaft cover 106 (which in the exampleof FIG. 1 is formed integrally with a fixing shaft male threaded member534 of FIG. 5 ) from the first fixing member 114 and a first flange 117a of the first toolhead 102. The user may also remove a second fixingshaft cover (on the far side of the first fixing shaft cover 106) fromthe first fixing member 114 and a second flange (see, e.g., secondflange 519 b of FIG. 5 ). The second fixing shaft cover is not shown inFIG. 1 . An example of a second fixing shaft cover may be the secondfixing shaft cover 528 of FIG. 5 . In the example of FIG. 5 , a fixingshaft sleeve 530 with internal female threads and/or the fixing shaftmale threaded member 534 of FIG. 5 may be collectively referred to as afixing shaft. In general, however, to change the first angle 110, theuser may remove the fixing shaft 131 from the at least one flange boreand the boss bore.

As used herein a reference to a fixing shaft, such as fixing shaft 131of FIG. 1A and fixing shaft 631 of FIG. 6 , is a reference to an objectthat is configured to be received within at least one flange bore andwithin the boss bore when axial centers of the at least one flange bore,the boss bore, and the fixing shaft may be coaxially aligned. Insertionof the fixing shaft 131 under these conditions fixes the relativepositions of the flanges of the toolhead (e.g., first toolhead 102) withrespect to the fixing member (e.g., first fixing member 114, or moreparticularly the boss of the first fixing member 114). Fixing therelative positions of the flanges of the toolhead with respect to thefixing member prevents translation of the fixing member relative to theat least one flange, or more particularly prevents longitudinaltranslation of the fixing member relative to the at least one flange ina direction of a longitudinal axis 108 of the first fixing member 114.According to some aspects, the fixing shaft 131 may be cylindrical butother shapes are within the scope of the disclosure. The fixing shaft131 may be smooth, have external threads, internal threads, or anycombination thereof along some or all of the fixing shaft 131. As usedherein, with respect to an x-y-z coordinate system, translation meanslinear movement in the x-y plane, the y-z plane, or the x-z plane.Translation is distinct from rotation about the x-axis, y-axis, orz-axis.

To change the first angle 110, following withdrawal of the fixing shaft131, the user may withdraw the pinion segment 116 a of the firsttoolhead 102 from engagement with a curved rack segment 118 a of thefirst fixing member 114. Withdrawal may be along the longitudinal axis108. After slidingly withdrawing the pinion segment 116 a from thecurved rack segment 118 a, a user may rotatably reorient the firsttoolhead 102 to any of a predetermined and fixed number of angularorientations. The user may then slidingly insert (e.g., slidinglyengage) the pinion segment 116 a into conjugate corresponding featuresof the curved rack segment 118 a (e.g., until at least a portion of thepinion segment 116 a meshes with at least a portion of (or the entireportion of) the curved rack segment 118 a and the flange bore axis iscoaxially aligned with the boss bore axis. As used herein, the term“mesh” may mean an engagement of teeth of one gear (e.g., a pinionsegment) to a whole depth of a space between teeth of another gear(e.g., a curved rack segment). The user may then insert the fixing shaft131 into at least the first flange 538 a and the boss to secure thefirst toolhead 102 from motion relative to the boss. In the example ofFIG. 1 , the pinion segment 116 a is a segment of a pinion gear with aplurality of first teeth having a first angular pitch (e.g., angularspacing between crests of adjacent teeth or between valleys betweenadjacent teeth) and the curved rack segment 118 a is a segment of acurved rack gear with a plurality of second teeth having the firstangular pitch. In the exemplary illustrations, the first teeth and thesecond teeth are sinusoidally shaped and configured for maximum surfacearea contact. Other tooth shapes, such as, for example, involute,cycloidal, and trochoidal, as well as other locking feature structuresare within the scope of the disclosure.

Returning to FIG. 1A, a second angle 128 (denoted as A2) of the secondtoolhead 104 relative to the handle 112 (or, as-illustrated in theexemplary figure, relative to a second segment 130 of the handle 112)may be selected by a user. The process for rotatably reorienting andfixing the second toolhead 104 to the second fixing member 120 may bethe same or substantially similar to that just described with referenceto the first toolhead 102 and first fixing member 114. The third lockingfeature 122 a of the second toolhead 104 and the fourth locking feature124 a of the second fixing member 120 may be the same or substantiallysimilar to those just described with reference to the pinion segment 116a of the first toolhead 102 and the curved rack segment 118 a of thefirst fixing member 114. Accordingly, the processes and features willnot be repeated for the sake of brevity. In general, the processes andfeatures will be described in greater detail below.

By way of example, either or both of the first fixing member 114 and thesecond fixing member 120 may be formed of metal and formed by hotforging, formed of metal and formed by cold-forging, formed of metal andformed by pouring the metal in a liquid state into a casting, formed ofplastic and formed by injection molding of the plastic, and/or formed offiberglass and formed by wrapping fiberglass around a mold andimpregnating the fiberglass with a resin. The preceding list isillustrative and non-limiting.

The first angle 110 may be the same or different from the second angle128. The angles depicted in FIG. 1 are provided for illustration and arenot limiting.

The handle 112 of the garden implement 100 may be formed of one piece ofstock or a plurality of pieces of stock (e.g., the stock may be hollowtubing). In the example of FIG. 1 , the handle 112 of the gardenimplement 100 may be a hollow rectangular length of tubing. According toone example, the tubing may be aircraft grade aluminum. It is noted thatthe preceding example is non-limiting. For example, solid materials andhollow materials of any cross-sectional shape are within the scope ofthe disclosure. Additionally, it is noted that other stock (including,for example, metals, fiberglass, and plastic) are within the scope ofthe disclosure.

The handle 112 may be straight or curved or take any shape. The handle112 may be described as including a plurality of segments. In theillustrated example of FIG. 1 , the handle 112 may be formed from threesegments; namely first segment 126, second segment 130, and centersegment 132. According to some aspects, the plurality of segments may becontinuous with each other, as in the example of FIG. 1 . According toother aspects, the plurality of segments may be contiguous with eachother and coupled to each other by joints between adjacent segments(e.g., as illustrated in FIG. 2 ). In some examples, the handle mayinclude one, two, three, or more segments.

In the exemplary illustration of FIG. 1B, there may be a fixed thirdangle 134 (denoted as A3), between the first segment 126 and the centersegment 132. By way of example only, the fixed third angle 134 may beany angle in a range of about 10 to 30 degrees, or more particularlywithin a range of about 15 to 25 degrees, or more particularly may beabout 20 degrees. In the exemplary illustration of FIG. 1B, there may bea fixed fourth angle 136 (denoted as A4) between the center segment 132and the second segment 130. By way of example only, the fixed fourthangle 136 may be any angle in a range of about 10 to 30 degrees, or moreparticularly within a range of about 15 to 25 degrees, or moreparticularly may be about 20 degree. In the example of FIG. 1 , thefixed third angle 134 and the fixed fourth angle 136 may be the same;however, having the fixed third angle 134 different from the fixedfourth angle 136 is within the scope of the disclosure.

According to some aspects, the fixed third angle 134 and the fixedfourth angle 136 may be chosen such the ends of the segments coupled tothe first fixing member 114 and the second fixing member 120,respectively, tip toward one another, toward one side of the centersegment 132 as depicted in FIG. 1 . According to other aspects, thefixed third angle 134 and the fixed fourth angle 136 may be chosen suchthe ends of the segments coupled to the first fixing member 114 and thesecond fixing member 120, respectively, tip away from one another.According to still other aspects, a value of at least one of the fixedthird angle 134 or the fixed fourth angle 136 may be zero; accordingly,in such an aspect, although the handle may be described as having threesegments, only one pair of segments would share a non-zero angletherebetween. The preceding examples are illustrative and arenon-limiting.

In the exemplary illustration of FIG. 1 , the first segment 126 may havea first fixed length 138 (denoted as L1), the center segment 132 mayhave a fixed center length 140 (denoted as LC), the second segment 130may have a fixed second length 142 (denoted as L2). The three lengthsmay be the same, or two lengths may be the same while a remaining lengthis different, or the three lengths may be different. In the exemplaryillustration of FIG. 1 , L1<L2<LC. These differences are exemplary andnon-limiting. Other relativistic arrangements of the lengths of thefirst segment 126, the second segment 130, and the center segment 132are within the scope of the disclosure.

As explained above, FIG. 1B depicts the garden implement 100 of FIG. 1Awith the first fixing shaft cover 106 and the second fixing shaft cover109 removed. With the first fixing shaft cover 106 removed, the pinionsegment 116 a associated with the first toolhead 102 and curved racksegment 118 a of the first fixing member 114 are visible. Similarly,with the second fixing shaft cover 109 removed, the third lockingfeature 122 a associated with the second toolhead 104 and the fourthlocking feature 124 a of the second fixing member 120 are visible. Thevarious locking features and their interaction will be described ingreater detail below. While the locking features of FIG. 1B (e.g., thepinion segment 116 a and the third locking feature 122 a, and thecorresponding curved rack segment 118 a and the fourth locking feature124 a, respectively) are illustrated as being the same, use of differentlocking features is within the scope of the disclosure. For example, onepair of locking features may offer a greater number of predeterminedfixed angular orientations than a second pair of locking features, orone pair of locking features may offer a greater resistance to angularchanges or may be rated to withstand a higher torque than a second pairof locking features.

FIG. 2 is a top plan view of another ergo-dynamic dual-headed gardenimplement 200 including two interchangeable toolheads (i.e., a firsttoolhead 202 and a second toolhead 204) that may be selected from aplurality of interchangeable toolheads according to some aspects of thedisclosure. FIG. 2 is similar to FIG. 1 in all respects with theexception of an addition of a first inter-segment angle fixing feature207 (e.g., a first joint) and a second inter-segment angle fixingfeature 209 (e.g., a second joint). Similar to the example of FIG. 1 ,the handle 212 of the garden implement 200 may include a first segment226, a second segment 230, and a center segment 232. In the example ofFIG. 2 , adjacent segments may be coupled to each other by theinter-segment angle fixing features, or joints. The first inter-segmentangle fixing feature 207 may be similar in construction and operation tothe first the pair of the pinion segment 116 a and curved rack segment118 a of FIG. 1B (or the pair of the third locking feature 122 a andfourth locking feature 124 a of FIG. 1B). The second inter-segment anglefixing feature 209 may be similar in construction and operation to thefirst the pair of the pinion segment 116 a and curved rack segment 118 aof FIG. 1B (or the pair of the third locking feature 122 a and fourthlocking feature 124 a of FIG. 1B). Descriptions of these features andrelated operations will not be repeated for the sake of brevity.

As depicted, the first inter-segment angle fixing feature 207 may beconfigured to permit a user to repeatably and selectively fix a fifthangle 234 (denoted as A5) between the first segment 226 and the centersegment 232. The fifth angle 234 may be selectable among a predeterminednumber of fixed angles. The fifth angle 234 may range, for example,between about plus and minus 90 degrees, or more particularly betweenabout plus and minus 60 degrees relative to an axis of the centersegment 232 of the garden implement 200 handle 212. Likewise, the secondinter-segment angle fixing feature 209 may be configured to permit auser to repeatably and selectively fix a sixth angle 236 (denoted as A6)between the center segment 232 and the second segment 230. The sixthangle 236 may be selectable among a predetermined number of fixedangles. The sixth angle 236 may range, for example, between about plusand minus 90 degrees, or more particularly between about plus and minus60 degrees relative to an axis of the center segment 232 of the gardenimplement 200 handle 212. The predetermined number of fixed anglesattributed to the first inter-segment angle fixing feature 207 and thesecond inter-segment angle fixing feature 209 may be the same ordifferent. The step sizes between the fixed angles may also be the sameor different. The configurations of the first inter-segment angle fixingfeature 207 and the second inter-segment angle fixing feature 209 may bethe same or different.

FIG. 3 is a perspective view of the garden implement 100 of FIGS. 1A and1B. Descriptions of components of FIG. 1 that were described inconnection with FIG. 1 (e.g., the handle 112, the first fixing member114, the second fixing member 120, the first toolhead 102, and thesecond toolhead 104) will not be repeated for the sake of brevity.

In FIG. 3 , a first lanyard bore 302 (e.g., a through hole formed in thefirst fixing member 114 and defined by internal sidewalls of the firstfixing member 114) is identified. Similarly, a second lanyard bore 304(e.g., a through hole formed in the second fixing member 120 and definedby internal sidewalls of the second fixing member 120) is identified.The first lanyard bore 302 and/or the second lanyard bore 304 may beused to secure one or more lanyards (not shown) (e.g., a rope that maybe formed with a loop and passed around the neck, shoulder, or wrist forholding the garden implement 100) to the garden implement. The one ormore lanyards may be used, for example, to add stability to the gardenimplement 100 as a user employs the garden implement 100. The one ormore lanyards may be used, for example, to secure the garden implement100 to keep it from falling to the ground or to temporarily fix thegarden implement 100 to an object, such as a chair, stool, wall, or workbench, for example.

A first rivet 306 and a second rivet 308 are also identified in FIG. 3 .According to some aspects, the first fixing member 114 may be insertablyfixed to the handle 112 of the garden implement 100 through use of atleast the first rivet 306. Likewise, the second fixing member 120 may beinsertably fixed to the handle 112 of the garden implement through useof at least the second rivet 308. In some aspects, the first rivet 306and/or the second rivet 308 may be installed and their heads ground orsanded down to be flush with the surfaces of the handle 112 of thegarden implement 100. According to some examples, a rivet such as thoseused to couple handles to kitchen or restaurant knives may be used. Suchrivets may be referred to as cutlery rivets. Of course, any fasteningstructure that is able to fix the first fixing member 114 and the secondfixing member 120 to the handle 112 of the garden implement 100 iswithin the scope of the disclosure. For example, rivets, screws, bolts,and/or dowels (alone or in combination with other components such asnuts and threaded holes) may be used to fix the first fixing member 114and second fixing member 120 to the handle 112 of the garden implement100.

According to some aspects, the first fixing member 114 and the secondfixing member 120 may be permanently fixed to the handle 112 of thegarden implement 100. An adhesive (not shown) may be applied to portionsof the first fixing member 114 and second fixing member 120 that areinserted into a hollow core of the handle 112 of the garden implement100. According to still other aspects, a fit between some or all of thesurfaces of the first fixing member 114 and second fixing member 120that are inserted into the hollow core of the handle 112 of the gardenimplement 100 may be configured with close tolerances such that a “forcefit” (also known as or similar to a “friction fit” or an “interferencefit”) of the first fixing member 114 and second fixing member 120 intothe hollow core of the garden implement 100 handle 112 is achieved. Withreference to FIG. 6 , a first rib 660 and/or second rib 662 of FIG. 6 )may surround a second boss 664. The second boss 664 may project from thebody segment 604 of a fixing member 614 in a direction different fromthe first boss 606 and may be configured to couple to a respective endof a handle 112 of the garden implement 100. The first rib 660 and/orthe second rib 662 may have outer dimensions that facilitate the forcefit between the inner surfaces of the handle 112 (which may be hollow)of the garden implement 100. The space above, below, and/or betweeneither or both of the first rib 660 and/or the second rib 662 may beused to receive an adhesive, for example. According to some aspects, anyone or any combination of one or more rivets, adhesive, and force fitmay be used to fix each fixing member (e.g., first fixing member 114,second fixing member 120) to the handle 112 of the garden implement 100.A cross-section taken along the lines 4-4 in FIG. 3 is provided in FIG.4 . An exploded view of a portion 500 of FIG. 3 is provided in FIG. 5 .While the second boss 664 is depicted as being configured to couple tothe respective end of the handle 112 by fitting within the hollow coreof the handle 112, the disclosure is not limited to this form ofcoupling. In one example, the second boss 664 could be configured to fitover the respective end of the handle, like a sleeve. In anotherexample, the second boss 664 may be configured with threads to screwinto or onto the respective end of the handle. The preceding examplesare illustrative and non-limiting.

FIG. 4 is a cross-section along the lines 4-4 of FIG. 3 of the gardenimplement 100 of FIGS. 1A and 1B according to some aspects of thedisclosure. Depicted is a rectangular hollow tube such as the handle 112of the garden implement 100. Of course, this configuration depicted inFIG. 4 is one non-limiting example. Other cross-sections are within thescope of the disclosure. A portion of the first fixing member 114 isdepicted as filing the hollow cross-section of the handle 112. Accordingto some aspects, dimensional tolerances of the portion of the firstfixing member 114 that enters the hollow space of the handle 112, and/orone or more ribs (e.g., first rib 660 and second rib 662 of FIG. 6C)that enter the hollow space of the handle 112 may have close toleranceto ensure a force fit therebetween. According to other aspects, thematerial of the first fixing member 114 may be relatively more malleablethan the material of the handle 112; the portion of the first fixingmember 114 that is inserted into the handle 112 may be caused to deformand/or to flow, thus fixing the portion of the first fixing member tothe handle 112. The first rivet 306 and a rivet sleeve 307 (previouslyhidden from view) are depicted in FIG. 4 . The heads of the first rivet306 and the rivet sleeve 307 are depicted in a flush-to-surfaceconfiguration. The illustrated configuration may be achieved, forexample, by sanding and/or grinding down any portion of a head (or otherprotruding part) of the first rivet 306 and/or the rivet sleeve 307 thatprotrudes from the outer surface of the handle 112.

FIG. 5 is an exploded perspective view of a portion 500 of the gardenimplement 100 as depicted in FIG. 3 according to some aspects of thedisclosure. Depicted are the first fixing member 114 coupled to a firsthandle end 502 (where, for example, the first handle end 502 may be arespective handle end of a pair of distal handle ends) of the handle 112of the garden implement 100. Second flange 519 b, which is hidden inFIG. 1 , FIG. 2 , and FIG. 4 is visible. Although the first rivet 306and the rivet sleeve 307 are used in connection with the illustratedportion of the garden implement 100, any fastening structure, such as arivet, screw, bolt, or dowel (with or without adhesive), for example, iswithin the scope of the disclosure.

The first fixing member 114, coupled to the first handle end 502, mayinclude (e.g., may comprise, may be formed of) a body segment 504 and afirst boss 506. A second boss (e.g., 664 of FIG. 6 ) may be receivedwithin a hollow space within the handle 112 of the garden implement 100,for example. The second boss is not depicted in the illustration of FIG.5 to avoid cluttering the drawing. According to some aspects, the bodysegment 504 may have a finite non-zero length and the body segment 504may be juxtaposed to the first handle end 502 of the handle 112, or thebody segment 504 may have a zero length and the first boss 506 mayproject from the second boss at the first handle end 502. The first boss506, body segment 504, and the second boss (not shown) may be formed asone integral part.

According to some aspects, the first boss 506 may project from the bodysegment 504, and away from the first handle end 502, along alongitudinal axis 508 (where, the longitudinal axis 508 is representedby a double headed arrow). The first boss 506 may include at least aportion having a first boss width (645 of FIG. 6 ) that is less than abody segment width (647 of FIG. 6 ) proximal to the first boss 606. Thespaced apart parallel boss surfaces 510 a, 510 b may be spaced apart bythe first boss width (645 of FIG. 6 ) The first boss width (645 of FIG.6 ) may correspond to the predetermined first distance (644 of FIG. 6 )between opposing parallel surfaces of the first flange 519 a and thesecond flange 519 b. The corresponding dimensions may be selected tofacilitate the sliding of the first boss 506 between the opposingparallel surfaces of the first flange 519 a and the second flange 519 b,within tolerance limits of manufacture. The first boss 506 may furtherinclude a boss bore 513 defined by an internal sidewall 515 of the firstboss 506. The boss bore 513 may have a boss bore center axis 512(depicted a long-dash dot line) perpendicular to the spaced apartparallel boss surfaces 510 a, 510 b and also perpendicular to thelongitudinal axis 508.

The first fixing member 114 (or the first boss 506 of the first fixingmember 114) may further include a pair of spaced apart second lockingfeatures including curved rack segment 118 a projecting from the spacedapart parallel boss surfaces 510 a, 510 b (where 510 b is not visible inFIG. 5 ) and another second locking feature projecting from an oppositeside of the first boss 506. In one example, the pair of spaced apartcurved rack segments (e.g., curved rack segment 118 a and curved racksegment 118 b) may be a pair of spaced apart curved walls that mayproject perpendicularly outward or away from the respective spaced apartparallel boss surfaces 510 a, 510 b. Each of the spaced apart curvedwalls may form curved rack segments (e.g., curved rack segment 118 a andcurved rack segment 118 b) that may span between spaced apart edges(e.g., spaced apart edges 656 of FIG. 6 ) of the first boss 506. Each ofthe pair of spaced apart curved rack segments 118 a, 118 b may beconfigured, for example, as a segment of an internal gear (also referredto as an internal ring gear or a ring gear) having a plurality of secondteeth with a given angular pitch.

According to some aspects, the curved rack segments 118 a, 118 b mayeach be a curved rack gear segment, also referred to herein as a curvedrack segment (e.g., curved rack segment 618 a, 618 b of FIG. 6 ). Theangular pitch may be the angular distance between crests of adjacentteeth or between roots of adjacent teeth. As used herein a segment maybe a non-360 degree arc length of a circle, or a portion of a circularof non-circular curve. According to some aspects, the angular pitch maynot evenly divide into 360 degrees. For example, according to oneaspect, the angular pitch may be 31.04 degrees. An angular pitch that isnot evenly able to divide into 360 degrees may facilitate the inclusionof a greatest amount of surface area for complete or partial spacesbetween adjacent crowns of teeth and thereby increases a total surfacearea against which engaged teeth of a pinion segment may exert force. Byway of one example, the angular pitch of 31.04 degrees provides forthree complete teeth and the spaces therebetween plus two partial spaceson either side of the three complete teeth. The angular pitch of 31.04degrees provides for 5 positions about which a toolhead may be oriented.In this example, a total range of orientations of 124.16 degrees. Sometoolheads may have more or less adjustment positions (e.g., 6 or 4positions). For a given torque applied to the toolhead, the greater thenumber of teeth the more susceptible is the chance of striping teethfrom the pinion segment 116 a, the curved rack segment 118 a, or both.Additional factors that relate to durability include the material usedto manufacture the pinion segment 116 a and the curved rack segment 118a, the whole depth of the spaces between adjacent teeth of the curvedrack segment 118 a and the height of adjacent teeth of the pinionsegment 116 a, as well as the thickness of the pinion segment 116 a incomparison to the height of the curved rack segment 118 a.

FIG. 5 also depicts the first toolhead 102. According to some aspects,the first toolhead 102 may include a pair of flanges (e.g., a firstflange 519 a and a second flange 519 b) and a tool member 103. As usedherein, the tool member 103 coupled to the first flange 519 a and thesecond flange 519 b may be collectively referred to as aninterchangeable toolhead herein (e.g., interchangeable toolhead 602 ofFIG. 6 ). Interchangeable toolheads may embody respective tools. Forexample, a cultivator of interchangeable toolhead 1002 of FIG. 10A, apush-pull rake of interchangeable toolhead 1004 of FIG. 10B, a spade ofinterchangeable toolhead 1006 of FIG. 10C.

In the example of FIG. 5 , the first flange 519 a includes a segment ofa first pinion gear, referred to herein as a first pinion segment 516 a(similar to the pinion segment 116 a of FIG. 1 ). The term pinion gearis used herein to refer to a gear having outwardly radiating teeth, or aportion of a circular or non-circular toothed curve having outwardlyradiating teeth, that mesh with an internal gear having inwardlyradiating teeth, or a portion of a circular or non-circular toothedcurve having inwardly radiating teeth. The first pinion segment 516 amay have a plurality of first teeth with the given angular pitch (i.e.,the same or complementary pitch as those of the plurality of secondteeth of a first curved rack segment 518 a (similar to the curved racksegment 118 a of FIG. 1 ). Again, as used herein a segment may be anon-360 degree arc length of a circle, or a portion of a circular ornon-circular curve. The first pinion segment 516 a may also include afirst flange bore 521 defined by an internal sidewall 522 of the firstflange 519 a.

The first and second fixing structures may be, for example, a pinionsegment and an internal gear segment configured to mesh with the pinionsegment, respectively. The structures of the first and second fixingstructures may be interchanged. The pluralities of teeth of thesesegments may be integrally formed with or in the flanges and the firstboss and may be used to lock the interchangeable toolhead at apredetermined angle relative to the longitudinal axis 508 of the firstboss 506 of the first fixing member 114 (and therefore relative to thehandle 112 of the garden implement).

The internal gear segment also referred to herein as first curved racksegment 518 a, may be concave semi-circular and may have a centercoincident with a center of the boss bore center axis 512 of the bossbore 513. In one aspect, the internal gear segment (e.g., a portion ofan annular gear or a ring gear) may have minor arc (less than 180degrees) that spans between outer edges of the first boss 506. Theplurality of second teeth of the internal gear segment may have creststhat radiate toward the boss bore center axis 512 of the boss bore 513.The plurality of second teeth may have roots between the crests.Adjacent pairs of crowns and roots form adjacent spaces between teeththat are arranged in a semi-circle, along the minor arc between the endsof the first boss 506. In one example, the spaces between teeth(measured between crowns of teeth) may have a maximum height (measuredalong the z-axis of FIG. 5 ) at a midpoint point equidistant from theends of the minor arc and a minimum height at both edges of the minorarc. The minimum height may be achieved by gradually reducing the heightof one or more tooth crests at both ends of the minor arc. In anotherexample, the height (e.g. a dimension measured perpendicularly to thatboss surface along the z-axis in FIG. 5 ) of the plurality of secondteeth may have a maximum at a midpoint point equidistant from the endsof the minor arc and may have minimum heights at both edges of the minorarc. The minimum tooth height may be achieved by a stepwise reduction inheight of one or more tooth crests at both ends of the minor arc.

FIG. 5 also depicts a second flange 519 b that includes a segment of asecond pinion gear, referred to herein as the second pinion segment 516b. The second pinion segment 516 b may include the first locking feature116 b formed as a plurality of first teeth of the second pinion segment516 b with the given angular pitch (i.e., the same or complementarypitch as those of the plurality of second teeth of the second lockingfeature (not shown) on the hidden side of the first boss 506 of FIG. 5). The second pinion segment 516 b may also include a second flange bore523 defined by an internal sidewall 524 of the second flange 519 b. Thecenter axis of the second flange bore 523 and the previously describedpinion center axis 532 may be collectively referred to as the pinioncenter axis 532.

In the example of FIG. 5 , the internal sidewall 522 defines a rightcircular cylinder, however any shape lies within the scope of thedisclosure. The internal sidewall 524 defines a carriage-bolt styleopening having a shape of a circle with two parallel segments of thecircle truncated, however any shape lies within the scope of thedisclosure. The internal sidewall 524 may receive a correspondinglyshaped carriage bolt feature 526 of the second fixing shaft cover 528.The carriage bolt feature 526 of the second fixing shaft cover 528, whenreceived in the second flange bore 523 serves to keep the fixing shaftsleeve 530 with internal female threads from rotating as the fixingshaft male threaded member 534 is rotated to tighten or loosen thefixing shaft male threaded member 534 in the fixing shaft sleeve 530with internal female threads. The first fixing shaft cover 106 and thesecond fixing shaft cover 528 with their integral components are onlyone example of a fixing shaft as described herein. Additional examplesinclude a carriage bolt and a nut or a wing nut, both without coverfeatures.

In the example of FIG. 5 , each of the first pinion segment 516 a andthe second pinion segment 516 b of the first flange 519 a and the secondflange 519 b, respectively, may be included in opposing parallel flangesurfaces (e.g., opposing parallel flange surfaces 625 a, 625 b of FIG. 6). In some examples, the respective opposing parallel flange surfaces(e.g., 625 a, 625 b of FIG. 6 ) may be in slidable contact withcorresponding respective spaced apart parallel boss surfaces 510 a, 510b. Tolerances of manufacturing may provide for spaces between theopposing surfaces.

The pinion center axis 532, which may be perpendicular to the opposingparallel flange surfaces (e.g., 625 a, 625 b of FIG. 6 ) andperpendicular to the spaced apart parallel boss surfaces 510 a, 510 bmay be configured to coaxially align with the boss bore center axis 512of the first fixing member 114 after the opposing parallel flangesurfaces (e.g., 625 a, 625 b of FIG. 6 ) slide parallel to and along thelongitudinal axis 508 and between the spaced apart parallel bosssurfaces 510 a, 510 b to where at least a portion of the plurality offirst teeth of pinion segments mesh with at least a portion of theplurality of second teeth of the internal gear segments proximal to thebody segment 504 of the first fixing member 114.

Once the boss bore center axis 512 and the pinion center axis 532 are incoaxial alignment, the fixing shaft, represented in the example FIG. 5as fixing shaft sleeve 530 with internal female threads (integrallyformed with the second fixing shaft cover 528), may pass through thesecond flange bore 523 and into (or into and through) the boss bore 513of the first boss 506 of the first fixing member 114, therebyimmobilizing the first toolhead 102 at the first angle 110 selected bythe user.

Thereafter, according to the example of FIG. 5 , the fixing shaft malethreaded member 534 of the first fixing shaft cover 106 may be threadedinto the fixing shaft sleeve 530 with internal female threads. The firstfixing shaft cover 106 may be rotated to secure the fixing shaft malethreaded member 534 into the fixing shaft sleeve 530 with internalfemale threads. The carriage bolt feature 526, and therefore the fixingshaft sleeve 530 with internal female threads may be prevented fromrotating due to it having been received in the second flange bore 523. Adevice, for example, such as a hex wrench (not shown) may be insertedinto a device receiving feature 536 of the first fixing shaft cover 106,to rotate the fixing shaft male threaded member 534 of the first fixingshaft cover 106 to either insert or withdraw the fixing shaft malethreaded member 534 from the fixing shaft sleeve 530 with internalfemale threads. According to some aspects, the fixing shaft sleeve 530with internal female threads and the carriage bolt feature 526 may beintegrally formed with second fixing shaft cover 528. According to someaspects, the fixing shaft male threaded member 534 may be integrallyformed with the first fixing shaft cover 106. Other hardware and/ordifferent orientations and/or configurations of hardware, which may beused to fix a fixing shaft (e.g., like the fixing shaft sleeve 530 withinternal female threads) in coaxial alignment with the pinion centeraxis 532 and the boss bore center axis 512 are within the scope of thedisclosure.

In overview, a garden implement, such as the garden implement 100 ofFIG. 1 , may include a handle 112 having spaced apart handle ends (see,e.g., first handle end 502), at least one toolhead 102 comprising a toolmember 103 and a pair of flanges 519 a, 519 b coupled to and extendingfrom the tool member 114, each flange 519 a, 519 b including a flangebore 521, 523 defined by a flange internal sidewall 522, 524 and apinion segment 516 a, 516 b having a common first center with the flangebore, the pair of flanges 519 a, 519 b having opposing parallel flangesurfaces each including the pinion segment and having a pinion centeraxis 532 intersecting the common first center and perpendicular to theopposing parallel flange surfaces, the opposing parallel flange surfacesspaced apart by a predetermined first distance, at least a first fixingmember 114 coupled between the pair of flanges 519 a, 519 b and arespective handle end 502, the first fixing member 114 including: afirst boss 506 projecting along a longitudinal axis 508 relative to thefirst fixing member 114, the first boss 506 having parallel first bosssurfaces 510 a, 510 b spaced apart by the predetermined first distance,a first boss bore 513 defined by a first boss internal sidewall 515, anda first boss bore center axis 512 intersecting a first boss bore centerand perpendicular to the parallel first boss surfaces 510 a, 510 b, eachrespective first boss surface 510 a, 510 b having a curved rack segment518 a (see also curved rack segments 618 a, 618 b) projectingperpendicularly therefrom and configured to mesh with at least a portionof the pinion segment 516 a, 516 b, and a fixing shaft (see, e.g.,fixing shaft sleeve 530) insertably received in at least one flange bore521, 523 and the first boss bore 513 following coaxial alignment of thepinion center axis 532 and the first boss bore center axis 512.

FIG. 6A is a left side elevation view of the fixing member 614 and aninterchangeable toolhead 602 of a garden implement in a spaced apartorientation according to some aspects of the disclosure. The gardenimplement may be similar to the garden implement 100 of FIG. 1 and/orthe garden implement 200 of FIG. 2 . FIG. 6B is a top plan view of thefixing member 614 and the interchangeable toolhead 602 of FIG. 6A. FIG.6C is a top plan view of the fixing member 614 and the interchangeabletoolhead of FIG. 6A and FIG. 6B according to some aspects of thedisclosure. In FIG. 6C, the fixing member 614 was longitudinallytranslate along the longitudinal axis 606 to slidingly engage the firstboss 606 of the fixing member 614 between a pair of opposing parallelflange surfaces 625 a, 625 b of the interchangeable toolhead 602. FIG.6C may represent one possible angular orientation (e.g., one possibleangle of rotation) between the interchangeable toolhead 602 and thefixing member 614 (or, more particularly, between interchangeabletoolhead 602 and the pair of flanges 619 a, 619 b). As depicted in FIG.1A, an angle (e.g., first angle 110, second angle 128) between theinterchangeable toolhead 602 (e.g., a coupled assembly of the firsttoolhead 102 and flanges, or of the second toolhead 104 and flanges) andthe fixing member (e.g., the first fixing member 114, that second fixingmember 120) may be changeably fixed by a user. The angle (e.g., firstangle 110, second angle 128) may be measured relative to a longitudinalaxis (e.g., 508 of FIG. 5, 608 of FIG. 6B) extending from the fixingmember. FIG. 6A, FIG. 6B, and FIG. 6C may be referred to individually orcollectively as FIG. 6 herein.

Each of FIG. 6A, FIG. 6B, and FIG. 6C depicts a portion of theinterchangeable toolhead 602. The interchangeable toolhead 602 includesa tool member 603 that is drawn in dashed line to indicate that the toolmember 603 could be any type of tool member. For example, the toolmember 603 may be a working part (separate from its handle) of a hoe, ashovel, a trowel, or any other type of object or structure used for aparticular purpose, including any type of gardening tool. The previouslist is exemplary and non-limiting.

A pair of flanges (e.g., first flange 619 a and second flange 619 b) mayextend from the tool member 603. Generally both flanges of the pair offlanges 619 a, 619 b extend from one side of the tool member 603 asshown in the exemplary illustration; however, subject to further spatialrelationships described below, both flanges are not limited to extendingfrom one side of the tool member 603. The pair of flanges 619 a, 619 bmay be coupled to the tool member 603 by, for example, welding orbrazing.

Each of the pair of flanges 619 a, 619 b may include a respective flangebore. In the example of FIG. 6 , first flange 619 a incudes the firstflange bore 621 and second flange 619 b includes the second flange bore623. The first flange bore 621 and the second flange bore 623 maycollectively be referred to as the first pion gear segment bore herein.The first flange bore 621 and the second flange bore 623 may each bedefined by internal sidewalls of the first flange 619 a and the secondflange 619 b (not identified in FIG. 6 ). Furthermore, each of the pairof flanges 619 a, 619 b may include a pinion segment 616 a, 616 b. Thepair of pinion segments 616 a, 616 b may be individually or collectivelyreferred to as the pinion segment 616 herein.

In the example of FIG. 6 , the first pinion segment 616 a may include aplurality of first teeth and the second pinion segment 616 b may includea corresponding plurality of first teeth. The first pinion segment 616 aand the second pinion segment 616 b may be formed in the first flange619 a and the second flange 619 b, for example, stamping, broaching,cold forging, or hot forging, among other techniques.

The first flange bore 621 and the pinion segment 616 a may have a commonfirst center 642. The second flange bore 623 and its correspondingpinion segment 616 b may have a common second center (not shown). Acommon flange bore axis (referred to herein as a pinion center axis 632)may intersect the first center 424 and the second center (not shown).

The pair of flanges 619 a, 619 b may have opposing parallel flangesurfaces 625 a, 625 b, respectively. The opposing parallel flangesurfaces 625 a, 625 b may include at least each respective pinionsegment 616 a, 616 b and first flange bore 621 and second flange bore623. The pinion center axis 632 may intersect the first center 424 andthe second center (not shown), as described above, and may also beperpendicular to the opposing parallel flange surfaces 625 a, 625 b. Theopposing parallel flange surfaces 625 a, 625 b may be spaced apart by apredetermined first distance 644.

A garden implement, such as the garden implement 100 of FIG. 1 , mayinclude two fixing members, such as first fixing member 114 and secondfixing member 120 of FIG. 1 . As illustrated herein, the first fixingmember 114 may be coupled, between the pair of flanges 619 a, 619 b atrespective handle ends (see, for example, first handle end 502 of FIG. 5). FIG. 6 , illustrates one fixing member, i.e., the fixing member 614,without a handle 112, to avoid cluttering the drawing.

The fixing member 614 may include a first boss 606 projecting along thelongitudinal axis 608 relative to the fixing member 614. Thelongitudinal axis 608 and translational directions of motion along thelongitudinal axis 608 are both represented by the broad double headedarrow in FIG. 6B.

The first boss 606 may have a parallel pair of boss surfaces 610 a, 610b spaced apart by the first boss width 645. Clearance may be consideredfor manufacturing, such that the predetermined first distance 644 andthe first boss width 645 are substantially the same yet allow the firstboss 606 to be slidingly received between the pair of flanges 619 a, 619b.

The first boss 606 may have a boss bore 615 defined by an internalsidewall (not identified in FIG. 6 ) of the first boss 606. A boss borecenter axis 612 may intersect a boss bore center 648 and may beperpendicular to the parallel pair of boss surfaces 610 a, 610 b. Eachof the parallel pair of boss surfaces 610 a, 610 b may have a respectivecurved rack segment 618 a, 618 b extending perpendicularly from therespective one of the parallel pair of boss surfaces 610 a, 610 b. Forease of reference, the curved rack segments 618 a, 618 b may be referredto individually or collectively as the curved rack segment 618 herein.

FIG. 6A also depicts a fixing shaft assembly 630. The fixing shaft 631may be insertably received in at least one of the first flange bore 621or the second flange bore 623 and the boss bore 615 following coaxialalignment of the pinion center axis 632 and the boss bore center axis612 following a longitudinal translation of the first boss 606 along thelongitudinal axis 608 between the opposing parallel flange surfaces 625a, 625 b and following an engagement of the respective pinion segments616 a, 616 b with the respective curved rack segments 618 a, 618 b. Thedouble headed dashed arrow 650 denotes a slideability of a first of theopposing parallel flange surfaces 625 a over the boss surfaces 610 a. Asimilar double headed arrow to denotes a slideability of a second of theopposing parallel flange surfaces 625 b over the boss surface 610 b isomitted to avoid cluttering the drawing.

A pair of parallel dashed lines in FIG. 6A represent a thickness 652 ofthe second pinion segment 616 b (e.g., a thickness of the portion of thesecond flange 619 b that includes the second pinion segment 616 b. Thethickness 652 of the second pinion segment 616 b may be equal to athickness of the first pinion segment 616 a; however, differentthicknesses are within the scope of the disclosure. According to someaspects, the combined thicknesses of the first pinion segment 616 a, thesecond pinion segment 616 b and the first boss 606 may be approximatelyequal to a body segment width 647 of the body segment 604 of the fixingmember 614. According to some aspects, the first pinion segment 616 athickness measured between parallel opposing first pinion segmentsurfaces may be less than or equal to a maximum height (measured alongthe z-axis in FIG. 6 ) between a boss surface (e.g., boss surface 610 a)outer surface 654 of the first boss 606 or the body segment 604 adjacentto a respective handle end.

In FIG. 6B and FIG. 6C, each of the plurality of first teeth of thefirst pinion segment 616 a are numbered from 1 to 8. Similarly, theouter boss surface 654 of the first boss 606 and/or the body segment 604of the fixing member 614 are labeled with the letters B, C, and D, whichcorrespond to a plurality of second teeth of the curved rack segment 618a. As illustrated in FIG. 6A and FIG. 6B, the outer surface 654 of thefirst boss 606 may taper down to the boss surface 610 a. The taper mayprevent interference between any of the plurality of first teeth of thepinion segment 616 a with any of the plurality of second teeth of thecurved rack segment 618 a. As can be seen from the illustration,particularly in the locations identified with dashed lines 667 and 669,if the curved rack segment 618 had full height of the outer surface 654of the first boss 606 throughout the second arc length 674 (see FIG. 6C)available to the plurality of second teeth of the curved rack segment618, then the outermost teeth (e.g., in positions corresponding to A,which are counter-clockwise from B and to E, which are clockwise fromD), which are eliminated in FIG. 6 to reflect an aspect of thedisclosure, would interfere with teeth 3 and 6 of the first pinionsegment 616 a. The interference would prevent the first of the opposingparallel flange surfaces 625 a of the first pinion segment 616 a fromtranslating along the boss surface 610 a in a direction of thelongitudinal axis 608 to a point where at least a portion of the firstpinion segment 616 a (e.g., a subset of the plurality of first teeth,labeled 3, 4, 5, and 6, of the first pinion segment 616 a) from meshingwith the at least a portion of the curved rack segment 618 a proximal tothe body segment 604 (e.g., at least a subset of the plurality of secondteeth, labeled B, C, D, of the curved rack segment 618 a). In thiscircumstance, due to the interference, coaxial alignment of the bossbore center axis 612 with the pinion center axis 632 would be preventedand the fixing shaft 631 would be unable to be received within the atleast one flange bore 623 and the boss bore 615. Accordingly, thoseteeth, which would have restricted a width of a path toward engagementof the pinion segment 616 a with the curved rack segment 618 a to anunacceptable width 670 are removed from the curved rack segment 618 a.Removal may be accomplished as a step function (e.g., an abruptreduction in height of the eliminated teeth, or as a tapered function(e.g., as depicted in FIG. 6 ), or as any function that preventsinterference such as that shown and described herein.

According to some aspects, and as indicated above, each respectivepinion segment 616 a, 616 b may be a segment of a first pinion gear or afirst circular or non-circular curve having a first arc length 672 asdepicted in FIG. 6C and each respective curved rack segment 618 may be asegment of an internal gear or a ring gear having teeth that face inwardtoward a center of the ring) having the second arc length 674 asdepicted in FIG. 6C. The first arc length 672 may be greater than thesecond arc length 674. As used herein, the arc length is a distancealong an arc, where an arc is part of the circumference of a circle (asillustrated in FIG. 6C), or a distance long a part of any circular ornon-circular curve.

In some examples, a subset of the plurality of second teeth (e.g., anumber of plurality of second teeth that is less than a total number ofthe plurality of second teeth of the curved rack segment 618 along thesecond arc length 674 that would prevent any of the plurality of firstteeth (denoted as tooth 1 to tooth 8) of the pinion segment 616 alongthe first are length 672 from translating in a direction along thelongitudinal axis 608 to be received within troughs between theplurality of second teeth (e.g., between tooth B and tooth C, betweentooth C and tooth D) may be removed (partially or completely) from alongthe second arc length 674 to avoid such interference. For illustrativepurposes, three teeth (labeled B, C, D) along the second arc length 674of the curved rack segment 618 are identified in FIG. 6B and FIG. 6C.The teeth that would have been labeled A and E (not shown) lie within azone of the first boss 606 that is depicted as tapering down from amaximum (e.g., widest point or substantially a widest point) of theouter surface 654 of the first boss 606 to a spaced apart edge 656(e.g., a point) of that is adjacent to and lies on the boss surface 610a. The tapering is shown in profile in FIG. 6A (see diminishing widthzone between ref. nos. 654 and 656) and as a series of spaced aparthorizontal lines above ref. no. 656 in FIG. 6B.

In some examples, the first pinion segment 616 a may have a plurality offirst teeth (e.g., teeth 1 to 8) having a first angular pitch and thefirst curved rack segment 618 a may be a segment of an internal gear(not explicitly identified as such in FIG. 6 , but represented asincluding tooth B, tooth C, and tooth D) having a plurality of secondteeth (e.g., teeth B, C, and D) having the first angular pitch (i.e.,the same pitch as the plurality of first teeth of the first pinionsegment 616 a), where the plurality of first teeth may be greater thanthe plurality of second teeth, and the engagement of the pinion segment616 a with the curved rack segment 618 comprises inserting (e.g.,meshing to a complete or maximum available depth) at least some of theplurality of first teeth into troughs between at least some of theplurality of second teeth.

According to some aspects, a first angle (not shown, e.g., a referenceor base line for the first angle) of the pinion segment 616 a relativeto a point on a surface of the tool member 603, where, for example, thefirst angle may be referenced to a line (not shown) intersecting thecommon first center 642 and any point on a surface of the tool member603) is fixed and a second angle (e.g., first angle 110 of FIG. 1 orsecond angle 129 of FIG. 1 ) between the first angle and thelongitudinal axis 608 may be changed after removal of the fixing shaft631 from the first boss 606 and the pair of flanges 619 a, 619 b (or anyone of them if the fixing shaft 631 was received in only the one ofthem). In some aspects, the second angle (e.g., first angle 110 of FIG.1 or second angle 129 of FIG. 1 ) between the first angle and thelongitudinal axis 608 may be changed after (e.g., only after) removal ofthe fixing shaft 631 from the first boss 606 and the pair of flanges 619a, 619 b (or any one of them if the fixing shaft 631 was received inonly the one of them), disengaging the pinion segment 616 from thecurved rack segment 618 by longitudinal translation of the first boss606 along the longitudinal axis 608 between the opposing parallel flangesurfaces 625 a, 625 b, rotating the pinion segment 616 relative to thecurved rack segment 618, longitudinal translation of the first boss 606along the longitudinal axis 608 between the opposing parallel flangesurfaces 625 a, 625 b to reengage the pinion segment 616 with the curvedrack segment 618, re-receiving (in the first boss 606 and the pair offlanges 619 a, 619 b, or any one of them) the fixing shaft assembly 630to again coaxially align the pinion center axis 632 and the boss borecenter axis 612 (with a center axis of the fixing shaft assembly 630(shown as being coincident with pinion center axis 632 in the explodeddrawing of FIG. 6A.

Returning to FIG. 1 , FIG. 5 , FIG. 6 , and FIG. 7 for reference, agarden implement 100 may include a handle 112 having spaced apart handleends. The garden implement may also include at least one toolheadincluding a tool member 103 and a pair of flanges (e.g., first flange519 a and second flange 519 b of FIG. 5 , first flange 619 a and secondflange 619 b of FIG. 6 ) coupled to and extending from the tool member103, each flange may include a flange bore 514 defined by the internalsidewall 515 and a pinion segment (e.g., pinion segment 116 a of FIG. 1, first pinion segment 516 a and second pinion segment 516 b of FIG. 5 ,first pinion segment 616 a and second pinion segment 616 b of FIG. 6 ,and pinion segment 716 of FIG. 7 ). The pinion segment may have a commonfirst center with the flange bore 514. The pair of flanges may haveopposing parallel flange surfaces 625 a, 625 b of FIG. 6 , eachincluding the pinion segment (identified above) and having a pinioncenter axis 532 intersecting the common first center and perpendicularto the opposing parallel flange surfaces 625 a, 625 b. The opposingparallel flange surfaces 625 a, 625 b may be spaced apart by apredetermined first distance 644. The garden implement may also includeat least a fixing member 114, 614, 714 that may be coupled between thepair of flanges (as identified above) and a respective handle end.

According to some aspects, the fixing member 114, 614, 714 may include afirst boss 506, 606 projecting along a longitudinal axis 508, 608, 708relative to the fixing member 114, 614, 714, the first boss 506, 606having spaced apart parallel boss surfaces 510 a, 510 b, 610 a, 610 bspaced apart by the predetermined first distance 644. The first boss506, 606 may include a boss bore 513 defined by the internal sidewall515, and a boss bore center axis 512, 612 intersecting a first boss borecenter and perpendicular to the spaced apart parallel boss surfaces 510a, 510 b, 610 a, 610 b, each respective first boss surface having acurved rack segment (e.g., first curved rack segment 118 a, first curvedrack segment 518 a, first curved rack segment 618 a, second curved racksegment 618 b, curved rack segment 718) projecting perpendicularlytherefrom and configured to mesh with at least a portion of the pinionsegment (identified above).

The garden implement may also include a fixing shaft 631, 731 (similarto fixing shaft sleeve 530 with internal female threads of FIG. 5 )insertably received in at least one flange bore (e.g., first flange bore521, second flange bore 523, first flange bore 621, second flange bore623, the boss bore 513, and the boss bore 613 following coaxialalignment of the pinion center axis 532, 632 and the boss bore centeraxis 512, 612.

Referring to FIG. 6C, according to some aspects, the pinion segment 616a may have a first arc length 672 and the curved rack segment 618 a mayhave a second arc length 674, where the first arc length 672 is greaterthan the second arc length 674. According to some examples, the secondarc length 674 may be free of any portion of a plurality of second teethof the curved rack segment 618 a that would prevent a slidableengagement of any of a plurality of first teeth of the pinion segment616 a from translating along the longitudinal axis 608 on a respectiveparallel boss surface 610 a, and prevent the any portion of theplurality of first teeth from a meshed engagement with a whole depth ofcorresponding spaces between teeth (e.g., between any crowns B, C, D ofFIG. 6 or adjacent to outboard portions of crowns B and D).

In some examples, the fixing shaft 631 that may be received in the atleast one of the second flange bore 623 or the first flange bore 621 andthe first boss bore 613 may prevent a translation along the longitudinalaxis 608 of the first boss 606 relative to the pair of flanges 619 a,619 b. In some examples, the fixing shaft 631 that may be received inthe at least one of the second flange bore 623 or that first flange bore621 and the first boss bore 613 fixedly maintains a meshed engagement ofthe curved rack segment 618 a, 618 b and the at least the portion of thepinion segment 616 a, 616 b. In still other examples, the fixing shaft631 may be insertably received in the at least one flange bore 623, 621and the first boss bore 613 following coaxial alignment of the pinioncenter axis 632 and the boss bore center axis 612 and following a meshedengagement of the curved rack segment 618 a, 618 b and the at least theportion of the pinion segment 616 a, 616 b.

In some examples an angle of the tool member 603 relative to thelongitudinal axis 608 may be fixed until after removal of the fixingshaft 631 from the first boss bore 613.

Returning to FIG. 1 , the handle 112 may be subdivided into at leastthree serially coupled handle segments including: a first segment 126having the first fixed length 138 and a first end coupled to the firstfixing member 114 and a first opposing end distal to the first end, asecond segment 130 having the fixed second length 142 and a second endcoupled to a second fixing member 120 and a second opposing end distalto the second end, and a center segment 132 having the fixed centerlength 140 coupled between the first opposing end of the first segment126 and the second opposing end of the second segment 130 at respectiveends of the center segment 132. In some aspects, a fixed third angle134, between the center segment 132 and the first segment 126 is a firstacute angle and a fixed fourth angle 136, between the center segment 132and the second segment 130 is a second acute angle. In some examples,the first acute angle and the second acute angle result in the firstsegment 126 and the second segment 130 being angled toward one side ofthe center segment 132. According to one aspect, the first segment 126,the center segment 132, and the second segment 130 may be formed as onecontinuous piece. Additionally, the fixed third angle 134 may be equalto the fixed fourth angle 136.

Referring to FIG. 2 , in some aspects, at least two or more of the firstsegment 226, the center segment 232, and the second segment 230 may beformed as separate pieces, and coupling between the at least two or moreof the first segment 226, the center segment 232, and the second segment230 may also include first inter-segment angle fixing feature 207 andthe second inter-segment angle fixing feature 209 configured to be fixedat any one of a plurality of angles provided within a range of the fifthangle 234, the sixth angle 236 ranging at least between plus and minus90 degrees relative to the center segment 232, inclusive.

Returning to FIG. 1 , in some examples, each of the pair of fixingmembers (e.g., first fixing member 114, second fixing member 120) mayalso include a second boss 664 of FIG. 6 extending away from the firstboss 606. The second boss 664 may be configured to couple to therespective end of the handle 112 of FIG. 1 , for example. According tosome aspects, the second boss 664 may be configured to fit into a hollowspace in the handle 112. The garden implement 100 may also include atleast one fixing member (such as first rivet 306 and the rivet sleeve307) configured to be received in a through hole 607 formed in andthrough the handle 112 and the second boss 664.

FIG. 7A is a top plan view of a fixing member 714 (similar to fixingmember 614 of FIG. 6 ), a toolhead 702 (similar to the interchangeabletoolhead 602 of FIG. 6 ), and a portion a handle 712 (similar to handle112 of FIG. 1 ) of a garden implement (such as the garden implement 100of FIG. 1 ) according to some aspects of the disclosure. A second boss764 is shown in phantom view for scale and orientation. The second boss764 projects from the body segment of the fixing member toward and intoa hollow space in the handle 712.

In FIG. 7A the toolhead 702 is rotated from a nominal orientation shownin FIG. 7B by a first predetermined angular distance 701 clockwiserelative to a longitudinal axis 708. A fixing shaft 731 is depicted asbeing received in coaxial alignment with a bore defined by internalsidewalls of the boss of the fixing member 714 and a bore defined byinternal sidewalls of at least one flange of the toolhead 702. Thefixing shaft 731 received in the boss bore and the at least one flangebore prevents a translation along the longitudinal axis of the firstboss relative to the pair of flanges. The lateral translation wouldinvolve the sliding of facing and opposing flange surfaces alongadjacent boss surfaces. According to some aspects, the fixing shaft 731received in the at least one flange bore and the boss bore fixedlymaintains a meshed engagement of the curved rack segment 718 and atleast the portion of the pinion segment 716. According to some aspects,the fixing shaft 731 may be insertably received in the at least oneflange bore and the boss bore following coaxial alignment of the pinioncenter axis and the boss bore center axis following a meshed engagementof the curved rack segment 718 and the at least the portion of thepinion segment 716.

In the example of FIG. 7A, pinion segment 716 tooth 1 is received in thepartial space width located counterclockwise from tooth B of the curvedrack segment 718. In the example of FIG. 7A, the angular pitch betweenadjacent tooth crowns and adjacent tooth roots may be represented by theangular segment X 720 in degrees. In the example of FIG. 7A, X is about31 degrees. Other values of X are within the scope of the disclosure.Each reorientation of the pinion segment 716 by one pinion segment toothposition results in a corresponding orientation change of the toolhead702. Reorientation clockwise by X degrees from that depicted in FIG. 7Amay cause a portion of the flange to interfere with the fixing member714. Reorientation counterclockwise in by an X degree increment (i.e.,by one tooth) allows for the pinion segment 716 tooth 2 to occupy thepartial space counterclockwise from tooth B of the curved rack segment718. An additional reorientation counterclockwise by an X degreeincrement allows for the pinion segment 716 tooth 3 to occupy thepartial space counterclockwise from tooth B of the curved rack segment718. This orientation is exemplified in FIG. 7B.

FIG. 7B is a top plan view of the fixing member 714 and the toolhead 702of FIG. 7A, where the toolhead 702 is in a “nominal” orientation. In thenominal orientation, tooth 3 of pinion segment 716 occupies the partialspace counterclockwise from tooth B of the curved rack segment 718. Inthe nominal orientation, a plane parallel to the tool member 703 of thetoolhead 702 is perpendicular to the longitudinal axis 708 andperpendicular to a corresponding longitudinal axis (not shown) extendingfrom the end of the handle; that is, from the end of the handle 712where the second boss 764 is located. Various ways to describe theangular orientation of the toolhead 702 with respect to the handle 712.It is noted that not all toolheads may extend perpendicularly from theirflanges as does the toolhead 702 of FIG. 7 . Accordingly, forconsistency herein, and without any limitation, angles of the toolheadsdescribed herein may be based on angular distance of the tool member 703of the toolhead 702 having a nominal orientation that is perpendicularto the longitudinal axis 708 extending from the boss of the fixingmember 714.

From the nominal orientation of FIG. 7B, reorientation clockwise by an Xdegree increment (i.e., by one tooth) allows for tooth 4 of the pinionsegment 716 to occupy the partial space counterclockwise from tooth B ofthe curved rack segment 718. An additional reorientationcounterclockwise by an X degree increment allows for tooth 5 of thepinion segment 716 to occupy the partial space counterclockwise fromtooth B of the curved rack segment 718. This orientation is exemplifiedin FIG. 7C.

FIG. 7C is a top plan view of the fixing member 714 and the toolhead 702of FIG. 7B, where the toolhead 702 is rotated from the nominalorientation of FIG. 7B to a maximum angular displacement 705counterclockwise. Further reorientation of the toolhead 702 in thecounterclockwise direction would result in the flange interfering withthe fixing member 714. A different design of the flange, which may clearthe fixing member if the toolhead was incremented, for example byanother X degree increment counterclockwise from the position shown inFIG. 7C, or clockwise from the position shown in FIG. 7A is within thescope of the disclosure.

In the examples from FIG. 7A to FIG. 7C, the exemplary toolhead 702having the exemplary pinion segment 716 in a meshed engagements with theexemplary curved rack segment 718 may be reoriented from a startingposition angle clockwise relative to the longitudinal axis 708 throughto the ending position angle counterclockwise relative to thelongitudinal axis 708. The example therefore depicts a total of 5available orientations including the starting orientation for a totalangular reorientation capability of about 124 degrees. The orientationsand angular segment X 720 values are illustrative and non-limiting.Other angular segment X 720 values that are greater or lesser than theexample of about 31 degrees provided herein are within the scope of thedisclosure. An increase in the angular segment X 720 may result in afewer number of teeth in both the pinion segment 716 and the curved racksegment 718. A decrease in the angular segment X 720 may result in agreater number of teeth in both the pinion segment 716 and the curvedrack segment 718. A tradeoff between angular segment X 720 value (andcorresponding numbers of teeth) and resistance to torque forces aboutthe pinion axis and the coaxial boss bore axis that may damage (e.g.,strip) teeth may be considered.

FIG. 7D is a top plan view of the fixing member 714 and the toolhead 702of FIG. 7C, where the toolhead 702 was removed from the fixing member,rotated about the longitudinal axis 708, and reinstalled to the fixingmember 714 according to some aspects of the disclosure. Thereorientation of the toolhead was accomplished by rotating the toolheadfrom pointing toward the right, to pointing toward the left. Note thatthe orientation of the handle 712 is not changed in FIGS. 7A, 7B, 7C,and 7D. Only the toolhead 702 is rotated in FIG. 7D. The ability toreorient the toolhead 702 according to this aspect provides foradditional range of angular orientation capability relative to thehandle 712.

FIG. 8A is a garden implement 800 (similar to garden implement 100 ofFIG. 1 ) with a first fixed orientation of a toolhead 802 relative tothe handle 812 of the garden implement 800 according to some aspects ofthe disclosure. The angle of the toolhead 802 relative to the handle 812may be fixed in a clockwise direction from a nominal orientation andused for a first purpose. For example, the toolhead 802 may be a hoe andthe first purpose may be to scrape or rake a surface of a plot of soil807 to level the surface. A human hand and forearm (e.g., a user's righthand and forearm) are illustrated. For example, a mound of soil to theright of the toolhead 802 may be scraped or raked into the depression tothe right of the mound of soil by pulling on the handle 812 in thedirection of the first force 811 (denoted as F1). An exerted effort 815(denoted as E1) (e.g., a force) may be exerted downward on the midpointof the handle 812. The exerted effort 815 may be applied by the user'sleft hand (not shown). In this way, with the first orientation of thetoolhead 802 relative to the handle 812 fixed, the garden implement 800may be used as a third class lever. The fulcrum 813 of the third classlever is located at the illustrated user's right hand, the exerted forceis exerted as effort 815 downward at the midpoint of the handle 812, andthe load 817 (denoted as L) is moved downward at the end of the handle812 (e.g., at the toolhead 802) according to some aspects of thedisclosure.

FIG. 8B is the garden implement 800 of FIG. 8A where the handle 812 wasrotated (e.g., inverted) from the orientation shown in FIG. 8A. That is,the user rotated the handle 812 about the axis (not shown) of the centersegment of the handle 812 to flip or invert the handle 812 and thetoolhead 802 by 180 degrees from the orientation shown in FIG. 8A. Theangle of the toolhead 802 relative to the handle 812 is maintained atthe same first fixed orientation depicted in FIG. 8A. The toolhead 802is not changed; it is still a hoe. However, the garden implement 800 isnow used for a second purpose; namely, the garden implement 800 of FIG.8B may be used as a lever to pry a rock 809 from the plot of soil 807.An exerted effort 815 may be exerted against the end of handle 812distal from the soil 807 in substantially the direction as shown. One orboth of the user's hands may pull or push the end of handle 812 distalfrom the soil 807 to exert the effort 815. The fulcrum 813 is nowlocated at the end of the handle 812 proximal to the soil 807 (e.g.,located at the toolhead 802). The load 817 may now be lifted from thesoil 807 in the direction shown by the application of the exerted effort815 on the handle 812 as shown. In this way, with the first orientationof the toolhead 802 relative to the handle 812 fixed and maintained, thegarden implement 800 may be used as a third class lever. An ability toutilize one toolhead 802 with a fixed or changed angle relative to thehandle 812 of the garden implement 800, as two distinct classes of amachine (e.g., a first class lever and a third class lever) is anunexpected benefit of the angular orientations of the center segment ofthe handle 812 relative to the first and second segments of the handle812.

FIG. 9A is a first garden implement 900 having a first handle 912 a witha first center segment 932 a having a first center length, La, accordingto some aspects of the disclosure. The first handle 912 a includes afirst segment 926 and a second segment 930 in addition to the firstcenter segment 932 a. According to one example, the first center length,La, may be about 52 inches.

FIG. 9B is a second garden implement 901 having a second handle 912 bwith a second center segment 932 b having a second center length, Lb,according to some aspects of the disclosure. The second handle 912 bincludes a first segment 926 and a second segment 930 in addition to thesecond center segment 932 b. According to one example, the second centerlength, Lb, may be about 40 inches.

FIG. 9C is a third garden implement 902 having a third handle 912 c witha third center segment 932 c having a third center length, Lc, accordingto some aspects of the disclosure. The third handle 912 c includes afirst segment 926 and a second segment 930 in addition to the thirdcenter segment 932 c. According to one example, the third center length,Lc, may be about 23 inches.

FIG. 9D is a fourth garden implement 903 having a fourth handle 912 dwith a fourth center segment 932 d having a fourth center length, Ld,according to some aspects of the disclosure. The fourth handle 912 dincludes a first segment 926 and a second segment 930 in addition to thefourth center segment 932 d. According to one example, the fourth centerlength, Lc, may be about 16 inches.

As depicted visually, and described in the examples, the first centerlength, La, is greater than the second center length, Lb. The secondcenter length, Lb, is greater than the third center length. Lc. Thethird center length. Ld, is greater than the fourth center length, Ld.The lengths may vary. A selection of various lengths provides for gardenimplements 900, 901, 902, 903 that can exert different forces on loadsbased on the center lengths of the handles of the garden implements. Theexertion of different forces based on center lengths may becomepertinent when, for example, the garden implements are used as levers.It is noted that even a rake is a lever; specifically, a rake is a thirdclass lever. The first segment 926 and second segment 930 may each bethe same structures (and respective same lengths) in the first gardenimplement 900, the second garden implement 901, the third gardenimplement 902 and the fourth garden implement 903. According to oneexample, the first segment 926 may be about 3-5 inches and the secondsegment may be about 8-10 inches. The preceding examples areillustrative and non-limiting.

Examples of garden tools include, for example, a border spade having aflat rectangular blade that may be used for digging in spaces havingcramped or restricted access; a bow rake having a bow-shaped frame thatconnects the teeth of the rake to a handle; a border fork having tinesthat are narrowly spaced and that may be used, for example, for weeding;a border spade that may be a specialized tool member that may be smallerthan other types of spades and may have a flat blade, for example, fordigging; a bulb planter that may be used to dig holes for bulbs and maysubsequently be used to replace that soil to cover the planted bulb; acompost fork that may have spaced apart tines and may be used, forexample, to turn over manure or to move mulch; a flat rake with strongteeth connected to a flat back that may be used, for example, forremoving rocks and other unwanted material from soil and for spreadingand leveling soil and mulch; a garden hoe that may have a smallrectangular blade used, for example, to shape soil, remove weeds, clearsoil, and harvest root crops; a garden shovel that may have a round,pointed or flat digging edge and may be used, for example, for digging,lifting, and/or moving soil; a hoe having a thin rectangular or squareblade and that may be used, for example, to break up clumps of soil forweeding; a leaf rake having flat fan-shaped resilient tines that mayradiate outward from a handle; a pick mattock having a pointed end and aspaced apart adze-like end distal from the pointed end that may be used,for example, for digging, carving, and/or chopping soil; a pitchfork orgarden fork having a small number of spaced apart tines and that may beused, for example, to lift and toss loose material such as straw or hay;a planting dibble having a pointed tip that may be used, for example, toform holes in soil; a pointed shovel having a pointed tip that may beused, for example, as a digging shovel; a potato fork that may havecurled tines and may be useful, as the name implies, for harvestingpotatoes; a round point shovel that may have a curved blade with a tipthat comes to a point and that may be used, for example, for scooping; ascoop shovel having a wide forward edge with a large flat surface withupward tending rear and side wall and that may be useful, for example,for scooping up a large quantity of matter when digging or moving thatmatter; a scuffle hoe that has a flat broad blade used parallel to thesurface of the soil with sharpened leading and trailing edges that maycut plant life (e.g., typically grass or weeds) from the surface of thesoil during forward and backward motion of the flat brad blade; a soilscoop that may be a general purpose digging implement with a bowl-shapedbody and pointed and/or serrated edges; a square point shovel that maybe used to dig into and lift loose matter, such as sand, loose topsoil,and pebbles, for example; a step edger that may be a sharpenedsemi-circular disc at the end of a handle and that may be used, forexample, straighten edges of lawns by, for example, trimming off theedges of the lawn that has grown over some boundary, such as a sidewalk;a transplant spade that may have a narrow, sometimes pointed diggingedge and a long narrow bed that is the same width as the digging edgeand may be used, for example, to deeply penetrate the soil and lift outlarge plants; a trench shovel (also called a clean out shovel orexcavator shovel) having a long, narrow blade with a sharpened curveddigging edge and may be used, for example, to dig or clean out trenches;a trowel, which in the context of gardening is typically a small curvedscoop-like shovel-like implement that may be used, for example, fordigging small holes to receive plants and/or for transferring smallamounts of matter (e.g., soil, fertilizer) from a bag to a gardening potor a garden bed, for example; a twist tiller configured with longtwisted tines that may be used to simultaneously till soil and removeweeds by rotating the twist tiller within the soil; a warren hoe, alsoknown as a ridging hoe, or drill hoe, which is a triangular orheart-shaped hoe designed for digging narrow furrows or shallow trenchesfor planting seeds or bulbs; a common weeder that is configured toremove weeds from soil; and a wheel edger that may be a sharpenedcircular disk on a transvers axis that is free to rotate about the axisas the wheel edger is pushed along, cutting away an edge, for example,of a lawn between the lawn and a sidewalk to establish a boundarytherebetween. The preceding list is exemplary and non-limiting. Any toolmember capable of being interchangeably fixed to the garden implementdescribed herein is within the scope of the disclosure.

FIG. 10A is an illustrative example of a first interchangeable toolhead1002 according to some aspects of the disclosure. The firstinterchangeable toolhead 1002 may be referred to as a cultivatortoolhead and may be used in association with tasks typically associatedwith cultivator-type tools.

FIG. 10B is an illustrative example of a second interchangeable toolhead1004 according to some aspects of the disclosure. The secondinterchangeable toolhead 1004 may be referred to as a push-pull raketoolhead and may be used in association with tasks typically associatedwith push-pull rake-type tools.

FIG. 10C is an illustrative example of a third interchangeable toolhead1006 according to some aspects of the disclosure. The thirdinterchangeable toolhead 1006 may be referred to as a spade toolhead andmay be used in association with tasks typically associated withspade-type tools.

The illustrative examples of FIGS. 10A, 10B, and 10C are exemplary andnon-limiting. any number of garden tools, such as those described above,may be fitted with flanges configured to receive a boss of a fixingmember of a garden implement as described herein. The toolheadsdescribed herein are interchangeable toolheads.

The spaced apart flanges having respective flange bores defined byinternal sidewalls of the respective flanges are exemplified in each ofthe first interchangeable toolhead 1002, the second interchangeabletoolhead 1004, and the third interchangeable toolhead 1006. In theexamples, one of the flange bore is circular and the other flange borehas flattened or straight surfaces truncating the otherwise circularbore. The flattened or straight surface serve as stops against which aportion of a fixing shaft (not shown) might rest. The configuration mayprevent the fixing shaft from rotating in configurations where, forexample, a nut is screwed onto the fixing shaft or a threaded malemember is screwed into a female threaded portion of the fixing shaft.Other shapes that may server as stops against which the portion of thefixing shaft might rest are within the scope of the disclosure.

According to some aspects. an interchangeable toolhead 1002, 1004, 1006may include a tool member 1003, 1005, 1007. The interchangeable toolhead1002, 1004, 1006 may also include a pair of flanges 1008, 1009, 1010extending from the tool member 1003, 1005, 1007. Each flange may includea flange bore 1011, 1012, 1013 defined by a flange internal sidewall1014, 1015, 1017 and a pinion segment 1016 a, 1016 b, 1016 c having acommon first center with the flange bore 1011, 1012, 1013, the pair offlanges 1008, 1009, 1010 having opposing parallel flange surfacesincluding at least the respective pinion segment 1016 a, 1016 b, 1016 cand a having a pinion center axis (e.g., pinion center axis 532 of FIG.5 , pinion center axis 632 of FIG. 6 ) intersecting the common firstcenters and perpendicular to the opposing parallel flange surfaces, theopposing parallel flange surfaces spaced apart by a predetermined firstdistance (e.g., 644 of FIG. 6 ). According to some examples, thepredetermined first distance may correspond to a width (e.g., first bosswidth 645) of a boss (e.g., first boss 606) coupled to and extendingfrom a handle 112 of a garden implement 100.

In some examples, the pinion segment 1016 a, 1016 b, 1016 c may have aplurality of first teeth 1020 a, 1020 b, 1020 c having a first angularpitch (e.g., angular segment X 720 of FIG. 7A). The first teeth of thepinion segment may be configured to mesh with a curved rack segment(e.g., 718 of FIG. 7 ) having a plurality of second teeth (e.g., 721 ofFIG. 7 ) having the first angular pitch, where the plurality of firstteeth 1020 a, 1020 b, 1020 c is greater than the plurality of secondteeth 721 of FIG. 7 . Furthermore, an angle of the toolhead 702 of FIG.7 relative to the handle 712 may be determined based on which of theplurality of first teeth 1020 a, 1020 b, 1020 c may be in a meshedengagement with the plurality of second teeth 721. The determination maybe made when the pinion center axis 532, 632 is coaxially aligned withthe boss bore center axis 512, 612. In some examples, at least a portionof first teeth 1020 a, 1020 b, 1020 c of the pinion segment 1016 a, 1016b, 1016 c may be configured to mesh with second teeth 721 of a curvedrack segment 718 coupled to a handle 112 of a garden implement 100. Insome examples, the pinion segment 1016 a, 1016 b, 1016 c may a first arclength (e.g., first arc length 672 of FIG. 6C) and the curved racksegment 618 has a second arc length (e.g., second arc length 674 of FIG.6 ), where the first arc length 672 is greater than the second arelength 674.

FIG. 11 is a graphical representation of plurality of articles ofmanufacture packaged as a garden implement set 1100 according to someaspects of the disclosure. The plurality of articles of manufactureinclude a handle 1102 having spaced apart handle ends, at least twotoolheads (e.g., a first toolhead 1108 and a second toolhead 1110) eachhaving a tool member and a pair of flanges coupled to and extending fromthe tool member, the pair of flanges including opposing parallel flangesurfaces spaced apart by a predetermined first distance, at least twofixing members (e.g., a first fixing member 1104 and a second fixingmember 1106) each fixed to respective handle ends and configured tocouple the handle 1102 to a respective one of the at least two toolheads(e.g., the first toolhead 1108 and the second toolhead 1110), and atleast two fixing shafts (e.g., a first fixing shaft 1112 and a secondfixing shaft 1114), each configured to be insertably received in a firstfixing shaft receiver of a respective toolhead (e.g., the first toolhead1108 and the second toolhead 1110) and a second fixing shaft receiver ofa respective fixing member (e.g., the first fixing member 1104 and thesecond fixing member 1106) when the fixing shaft, first fixing shaftreceiver, and second fixing shaft receiver are coaxially aligned.

According to some aspects, the first fixing shaft receiver of therespective toolhead may include a flange bore defined by a respectiveflange internal sidewall of each respective flange, each respectiveflange may further include a pinion segment having a common center withthe flange bore and a pinion segment center axis. Each of the at leasttwo fixing members (e.g., first fixing member 1104 and second fixingmember 1106) may further include a respective boss having a curved racksegment configured to mesh with at least a portion of the pinionsegment. Still further the second fixing shaft receiver of therespective fixing member may include a boss bore defined by a respectiveboss internal sidewall, and a boss bore center axis.

In some examples, the at least two fixing members (e.g., first fixingmember 1104 and second fixing member 1106) may each include a first bossprojecting along a longitudinal axis relative to the respective fixingmember, the first boss having parallel first boss surfaces spaced apartby the predetermined first distance, a first boss bore defined by afirst boss internal sidewall, and a first boss bore center axisintersecting a first boss bore center and perpendicular to the parallelfirst boss surfaces, each respective first boss surface having a curvedrack segment projecting perpendicularly therefrom and configured to meshwith at least a portion of a pinion segment of the pair of flanges. Thepinion segment may have a first arc length and the curved rack segmentmay have a second arc length, where the first arc length is greater thanthe second arc length. Still further, the second arc length may be freeof any portion of a plurality of second teeth of the curved rack segmentthat would prevent a slidable engagement of any of a plurality of firstteeth of the pinion segment from translating along the longitudinal axison a respective parallel boss surface, and prevent the any portion ofthe plurality of first teeth from a meshed engagement with spacesbetween any crowns of the plurality of second teeth.

One or more of the components, features, and/or functions illustrated inFIGS. 1-11 may be rearranged and/or combined into a single component,feature or function or embodied in several components, features, orfunctions. Additional elements, components, and/or features may also beadded without departing from the disclosure.

The word “exemplary” is used herein to mean “serving as an example,instance, or illustration.” Any implementation or aspect describedherein as “exemplary” is not necessarily to be construed as preferred oradvantageous over other implementations or aspects described herein.

Likewise, the term “aspects” does not require that all aspects of thedisclosure include the discussed feature, advantage, or mode ofoperation.

The term “coupled” is used herein to refer to the direct or indirectcoupling between two objects. For example, if object A physicallytouches object B, and object B touches object C, then objects A and Cmay still be considered coupled to one another—even if they do notdirectly physically touch each other.

The construct of “at least one of A or B” is intended to cover A, B, andA and B. The construct of “A and/or B” is likewise intended to cover A,B, and A and B.

While the foregoing disclosure shows illustrative embodiments, it shouldbe noted that various changes and modifications could be made hereinwithout departing from the scope of the disclosure as defined by theappended claims. The functions, steps and/or actions described herein orrepresented in any method claims in accordance with the embodimentsdescribed herein need not be performed in any particular order.Furthermore, although elements of embodiments may be described orclaimed in the singular, the plural is contemplated unless limitation tothe singular is explicitly stated.

The previous description of the disclosed aspects is provided to enableany person skilled in the art to make or use those aspects as presentedabove and in the claims that follow. Various modifications to theseaspects will be readily apparent to those skilled in the art, and thegeneric principles defined herein may be applied to other aspectswithout departing from the spirit or scope of the invention. Thus, thepresent disclosure is not intended to be limited to the aspects shownherein but is to be accorded the widest scope consistent with theprinciples and novel features disclosed herein.

Although the present disclosure and its advantages have been describedin detail, it should be understood that various changes, substitutionsand alterations can be made herein without departing from the spirit andscope of the disclosure as defined by the appended claims. Moreover, thescope of the present application is not intended to be limited to theparticular embodiments of the process, machine, manufacture, compositionof matter, means, methods and steps described in the specification. Asone of ordinary skill in the art will readily appreciate from thedisclosure of the present disclosure, processes, machines, manufacture,compositions of matter, means, methods, or steps, presently existing orlater to be developed that perform substantially the same function orachieve substantially the same result as the corresponding embodimentsdescribed herein may be utilized according to the present disclosure.Accordingly, the appended claims are intended to include within theirscope such processes, machines, manufacture, compositions of matter,means, methods, or steps.

What is claimed is:
 1. A garden implement, comprising: a handle havingspaced apart handle ends; at least one toolhead comprising a tool memberand a pair of flanges coupled to and extending from the tool member,each flange including a flange bore defined by a flange internalsidewall and a pinion segment having a common first center with theflange bore, the pair of flanges having opposing parallel flangesurfaces each including the pinion segment and having a pinion centeraxis intersecting the common first center and perpendicular to theopposing parallel flange surfaces, the opposing parallel flange surfacesspaced apart by a predetermined first distance; at least a first fixingmember coupled between the pair of flanges and a respective handle end,the first fixing member including: a first boss projecting along alongitudinal axis relative to the first fixing member, the first bosshaving parallel first boss surfaces spaced apart by the predeterminedfirst distance, a first boss bore defined by a first boss internalsidewall, and a first boss bore center axis intersecting a first bossbore center and perpendicular to the parallel first boss surfaces, eachrespective first boss surface having a curved rack segment projectingperpendicularly therefrom and configured to mesh with at least a portionof the pinion segment; and a fixing shaft insertably received in atleast one flange bore and the first boss bore following coaxialalignment of the pinion center axis and the first boss bore center axis.2. The garden implement of claim 1 wherein the pinion segment has afirst arc length and the curved rack segment has a second arc length,wherein the first arc length is greater than the second arc length. 3.The garden implement of claim 2 wherein the second arc length is free ofany portion of a plurality of second teeth of the curved rack segmentthat would prevent a slidable engagement of any of a plurality of firstteeth of the pinion segment from translating along the longitudinal axison a respective parallel boss surface, and prevent the any portion ofthe plurality of first teeth from a meshed engagement with spacesbetween any crowns of the plurality of second teeth.
 4. The gardenimplement of claim 1, wherein the fixing shaft received in the at leastone flange bore and the first boss bore prevents a translation along thelongitudinal axis of the first boss relative to the pair of flanges. 5.The garden implement of claim 1, wherein the fixing shaft received inthe at least one flange bore and the first boss bore fixedly maintains ameshed engagement of the curved rack segment and the at least theportion of the pinion segment.
 6. The garden implement of claim 1,wherein the fixing shaft is insertably received in the at least oneflange bore and the first boss bore following coaxial alignment of thepinion center axis and the first boss bore center axis and following ameshed engagement of the curved rack segment and the at least theportion of the pinion segment.
 7. The garden implement of claim 1,wherein the handle is subdivided into at least three serially coupledhandle segments including: a first segment having a first length and afirst end coupled to the first fixing member and a first opposing enddistal to the first end; a second segment having a second length and asecond end coupled to a second fixing member and a second opposing enddistal to the second end; and a center segment having a center lengthcoupled between the first opposing end of the first segment and thesecond opposing end of the second segment at respective ends of thecenter segment, wherein a first angle, between the center segment andthe first segment is a first acute angle and a second angle, between thecenter segment and the second segment is a second acute angle, and thefirst acute angle and the second acute angle result in the first segmentand the second segment being angled toward one side of the centersegment.
 8. The garden implement of claim 7, wherein: the first segment,the center segment, and the second segment are formed as one continuouspiece; and the first acute angle is equal to the second acute angle. 9.The garden implement of claim 7, wherein: at least two or more of thefirst segment, the center segment, and the second segment are formed asseparate pieces, and coupling between the at least two or more of thefirst segment, the center segment, and the second segment furthercomprises: a joint configured to be fixed at any one of a plurality ofangles ranging at least between plus and minus 90 degrees relative tothe center segment, inclusive.
 10. The garden implement of claim 1,wherein the at least the first fixing member further comprises: a secondboss extending away from the first boss and configured to couple to therespective handle end.
 11. An interchangeable toolhead, comprising; atool member; and a pair of flanges coupled to and extending from thetool member, each flange including a flange bore defined by a flangeinternal sidewall and a pinion segment having a common first center withthe flange bore, the pair of flanges having opposing parallel flangesurfaces including at least a respective pinion segment and a pinionaxis intersecting the common first centers and perpendicular to theopposing parallel flange surfaces, the opposing parallel flange surfacesspaced apart by a predetermined first distance.
 12. The interchangeabletoolhead of claim 11, wherein the predetermined first distancecorresponds to a width of a boss coupled to and extending from a handleof a garden implement.
 13. The interchangeable toolhead of claim 12,wherein the pinion segment has a plurality of first teeth having a firstangular pitch and is configured to mesh with a curved rack segmenthaving a plurality of second teeth having the first angular pitch,wherein the plurality of first teeth is greater than the plurality ofsecond teeth and an angle of the interchangeable toolhead relative tothe handle is determined based on which of the plurality of first teethis in a meshed engagement with the plurality of second teeth.
 14. Theinterchangeable toolhead of claim 11, wherein at least a portion offirst teeth of the pinion segment is configured to mesh with secondteeth of a curved rack segment coupled to a handle of a gardenimplement.
 15. The interchangeable toolhead of claim 14, wherein thepinion segment has a first arc length and the curved rack segment has asecond arc length, wherein the first arc length is greater than thesecond arc length.
 16. A plurality of articles of manufacture packagedas a garden implement set, comprising: a handle having spaced aparthandle ends; at least two toolheads each having a tool member and a pairof flanges couple to and extending from the tool member, the pair offlanges including opposing parallel flange surfaces spaced apart by apredetermined first distance; at least two fixing members each fixed torespective handle ends and configured to couple the handle to arespective one of the at least two toolheads; and at least two fixingshafts, each configured to be insertably received in a first fixingshaft receiver of a respective toolhead and a second fixing shaftreceiver of a respective fixing member when respective fixing shafts,respective first fixing shaft receivers, and second fixing shaftreceivers are coaxially aligned.
 17. The plurality of articles ofmanufacture packaged as the garden implement set of claim 16, wherein:the first fixing shaft receiver of the respective toolhead comprises aflange bore defined by a respective flange internal sidewall of eachrespective flange, each respective flange further comprising: a pinionsegment having a common center with the flange bore and a pinion segmentcenter axis; the at least two fixing members each further comprising aboss having a curved rack segment configured to mesh with at least aportion of the pinion segment; and the second fixing shaft receiver offurther comprises a boss bore defined by a boss internal sidewall. 18.The plurality of articles of manufacture packaged as the gardenimplement set of claim 16, wherein the at least two fixing members eachcomprise: a first boss projecting along a longitudinal axis relative tothe respective fixing member, the first boss having parallel first bosssurfaces spaced apart by the predetermined first distance, a first bossbore defined by a first boss internal sidewall, and a first boss borecenter axis intersecting a first boss bore center and perpendicular tothe parallel first boss surfaces, each respective first boss surfacehaving a curved rack segment projecting perpendicularly therefrom andconfigured to mesh with at least a portion of a pinion segment of thepair of flanges.
 19. The plurality of articles of manufacture packagedas the garden implement set of claim 18, wherein the pinion segment hasa first arc length and the curved rack segment has a second arc length,wherein the first arc length is greater than the second arc length. 20.The plurality of articles of manufacture packaged as the gardenimplement set of claim 19, wherein the second arc length is free of anyportion of a plurality of second teeth of the curved rack segment thatwould prevent a slidable engagement of any of a plurality of first teethof the pinion segment from translating along the longitudinal axis on arespective parallel boss surface, and prevent the any portion of theplurality of first teeth from a meshed engagement with a space betweenany crowns of the plurality of second teeth.